Elon Musk said Tesla used internet videos to train self-driving tech in China
1. Tesla launched self-driving features in China using internet videos for training. 2. Feature rollout focuses on driver-assist, not full autonomy. 3. BYD offers free self-driving software, increasing competition for Tesla. 4. Tesla's vehicle sales declined for the first time in a decade. 5. Elon Musk emphasizes Tesla's evolution into an AI and robotics company.